<?php
/*
Write clear fonts on images by using the gd library
@copyright UGiA.CN
*/
function clear_fonts(&$im, $size, $x, $y, $color, $fontfile, $text, $outer) {
	if (!function_exists('ImageColorAllocateHEX')) {
		function ImageColorAllocateHEX($im, $s) {
		   if($s{0} == "#") $s = substr($s,1);
		   $bg_dec = hexdec($s);
		   return imagecolorallocate($im,
				($bg_dec & 0xFF0000) >> 16,
				($bg_dec & 0x00FF00) >>  8,
				($bg_dec & 0x0000FF)
			);
		}
	}

	$ttf = false;

	if (is_file($fontfile)) {
		$ttf = true;
		$area = imagettfbbox($size, $angle, $fontfile, $text);

		$width  = $area[2] - $area[0] + 2;
		$height = $area[1] - $area[5] + 2;
	} else {
		$width  = strlen($text) * 10;
		$height = 16;
	}

	$im_tmp = imagecreate($width, $height);
	$white = imagecolorallocate($im_tmp, 255, 255, 255);
	$black = imagecolorallocate($im_tmp, 0, 0, 0);

	$color = ImageColorAllocateHEX($im, $color);
	$outer = ImageColorAllocateHEX($im, $outer);

	if ($ttf) {
		imagettftext($im_tmp, $size, 0, 0, $height - 2, $black, $fontfile, $text);
		imagettftext($im, $size, 0, $x, $y, $color, $fontfile, $text);
		$y = $y - $height + 2;
	} else {
		imagestring($im_tmp, $size, 0, 0, $text, $black);
		imagestring($im, $size, $x, $y, $text, $color);
	}

	for ($i = 0; $i < $width; $i ++) {
		for ($j = 0; $j < $height; $j ++) {
			$c = ImageColorAt($im_tmp, $i, $j);
			if ($c !== $white) {
				ImageColorAt ($im_tmp, $i, $j - 1) != $white || imagesetpixel($im, $x + $i, $y + $j - 1, $outer);
				ImageColorAt ($im_tmp, $i, $j + 1) != $white || imagesetpixel($im, $x + $i, $y + $j + 1, $outer);
				ImageColorAt ($im_tmp, $i - 1, $j) != $white || imagesetpixel($im, $x + $i - 1, $y + $j, $outer);
				ImageColorAt ($im_tmp, $i + 1, $j) != $white || imagesetpixel($im, $x + $i + 1, $y + $j, $outer);

				/* The effect of following codes looks like shine in Fireworks
				ImageColorAt ($im_tmp, $i - 1, $j - 1) != $white || imagesetpixel($im, $x + $i - 1, $y + $j - 1, $outer);
				ImageColorAt ($im_tmp, $i + 1, $j - 1) != $white || imagesetpixel($im, $x + $i + 1, $y + $j - 1, $outer);
				ImageColorAt ($im_tmp, $i - 1, $j + 1) != $white || imagesetpixel($im, $x + $i - 1, $y + $j + 1, $outer);
				ImageColorAt ($im_tmp, $i + 1, $j + 1) != $white || imagesetpixel($im, $x + $i + 1, $y + $j + 1, $outer);
				*/
			}
		}
	}

	imagedestroy($im_tmp);
}

$words = isset($_GET['words']) ? $_GET['words'] : 'Hello';

header("Content-type: image/png");

$im = imagecreatefromjpeg("../media/female.jpg");
$white = imagecolorallocate($im, 255,255,255);

clear_fonts($im, 9, 10, 30, '#000000', "../fonts/simsun.ttc", $words, '#ffffff');
imagepng($im);
imagedestroy($im);
?>